http://www.dotnetmafia.com/blogs/dotnettipoftheday/archive/2009/12/09/enterprise-search-web-parts-are-still-sealed-unseal-them-sp2010.aspx
Content Type versioning, very nice feature ....
http://www.dotnetmafia.com/blogs/dotnettipoftheday/archive/2010/01/04/feature-versioning-and-upgrades-in-sharepoint-2010.aspx
http://www.binarywave.com/blogs/eshupps/Lists/Posts/Post.aspx?List=9c93c708%2De5ce%2D4714%2Dbdea%2D499330361130&ID=228
http://blogs.msdn.com/astoriateam/archive/2009/10/21/using-data-services-over-sharepoint-2010-part-1-getting-started.aspx
http://blogs.breezetraining.com.au/mickb/2009/11/02/SharePoint2010DevelopingAlmost.aspx
http://keutmann.blogspot.com/2009/12/wspbuilder-2010-beta.html?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+CarstenKeutmann+%28Carsten+Keutmann%29
WSP Builder is simply the bets Sharepoint development tool out there ...
http://fmuntean.wordpress.com/2009/11/26/developer-dashboard/